Yamaha RX-V773WA 7.2- Channel Network AV Receiver (Discontinued by Manufacturer) 7-channel powerful surround supported in HD Audio format decoding: Dolby TrueHD and DTS-HD Master Audio; Dolby Digital Plus and DTS-HD High Resolution Audio Network recceiver with AirPlay, allows music streaming from Mac, PC, iPod, iPhone, iPad 4K Upscaling for next generation super high resolution displays, and HDMI (6 in/2 out) with 3D and Audio Return Channel AV Controller app for operating various functions from an iPod, iPhone, iPad or Android phones YPAO R.S.C. (Reflected Sound Control) sound optimization with multi-point measurement